Folding guide for sewing machines



Jan. 15, 1935. R. JlSAlLER FOLDING GUIDE FOR SEWING MACHINES Filed Feb.3, 1935 2 Sheets-Sheet 1 Hudalpfi J 45 056761 Jan. 15, 1935. R, J sAlLERFOLDING GUIDE FOR SEWING MACHINES 2 Sheets-Sheet 2 Filed Feb. 3, 1933mmm W? 9 Patented Jan. 15, 1935 UNITED STATES PATENT GFFl-CE SingerManufacturing Company,

Elizabeth,

N. J'., a corporation of New Jersey Application February 3, 1933, SerialNo. 654,975

8 Claims.

This invention relates to folding guides for attachment to sewingmachines and has for a particular object to provide an attachment forinfolding the edges of two superposed plies of material and introducingtherebetween, in advance of the sewing machine needle, a folded pipingstrip which is stitched inposition between the infolded edge-portions ofthe superposed plies by a line of stitches passing straight through allof the plies and folded portions thereof. Such a piped seam may be usedas a mattress edgefinishing seam or for various purposes where a pipedseam is-desired.

Another object of the invention is to provide a simplified and improvedsewing machine guiding attachment which will guide and individuallyposition the edges of a plurality of plies of material and permit of theindependent adjustment of such edges laterally of the line ofseam-formation; a further object of the invention being to provide forthe ready removal of the attachment from and replacement in sewingposition, without disturbance of the adjustments, so that the operatormay instantly make use of the attachment or discard it at will, withoutinterfering with its adjustments.

With the above and other objects in view, as

will hereinafter appear, the invention comprisesfolding attachmentembodying the'invention and disposed in'workingposition on the bed of asewing machine. Fig. 2 is a rear elevation of the attachment. Fig. 3 isa sectional view through a stitched seam produced by aid of theattachment. Fig. 4 is a top plan view of the attachment. Fig. 5 is aperspective view of the attachment as seen from a position directly infront of it. Fig. 6 is a r perspective view of the base-portion of theattachment, and Fig. '7 is a left side elevation of the attachment.

1 represents a base-plate which is fastened to the cloth-plate 2 of asewing machine by screws 3 which pass through the slot 4 in thebase-plate 1 permitting adjustment of the base-plate transversely of theline aa of seam-formation. The base-plate 1 is formed with a rearwardlyand laterally extending tongue 5 which has an upturned lip 6constituting an edge-guide disposed closely alongside the sewing machinep'resserfoot '7 and needle 8.

Pivotally mounted on the screw 9 threaded into the thickened end-portion10 of' the baseplate 1 is a carrier-plate 11 having at one end adownturned lip 12 adapted to rest upon the sewing machine cloth-plate 2and support the carrier-plate in parallelism with the base-plate 1.Disposed between the carrier-plate 11 and the head of the screw 9 is adished spring washer 9 which frictionally and snugly holds thecarrierplate in any position to which it may be swung about the screw 9as a pivot.

Mounted in superposed relation on the carrierplate 11, by means of thescrews 13, are the slotted shanks 14, 15, 16 of a lower edge-foldingscroll 17, an intermediate piping guide 18 and an upper edge-foldingscroll 19, respectively. The slots in the shanks 14, 15 and 16 extendtransversely of the line a' a of seam-formation and permit of theindividual adjustment and setting of the scrolls 1'7,v 19 and pipingguide 18 relative to the line of seam-formation and relative to oneanother and to the edge-guide 6.

The lower and upper folding scrolls 17 and 19' have the respectiveWork-supporting platforms 1'7, 19'. The lower scroll 17 folds theedge-portion 20 of a lower ply 21 of material upwardly while the upperscroll 19 folds the edge-portion 22 of an upper ply 23 of materialdownwardly around the edge 19 of the platform 19'.

The intermediate piping guide 18 is preferably formed as a flattenedtube extending'lengthwiseof'the line of seam-formation and inclined downwardly toward its delivery end. The'lower wall of the tube 18 isextended forwardly to form theupper wall of a lead-in tube 24 whichextends at right angles to the tube 18 and is disposed in plane belowthe plane of the tube 18, asshown in Fig. 5. Such wall hasanedge-portion 25 at to the longitudinal axes of the tubes 18 and 24.The longitudinally folded piping strip 26 is delivered by the lead-intube 24 to the inclined edge 25 around which the folded piping strip isdrawn upwardly and inverted at right angles to the lead-in tube 24 intothe guide-tube 18 which delivers it between the. edge folds 20 and 22 tothe sewing machine mechanism which forms the usual line of stitches 27.The inverting of both plies of the folded piping strip in the samedirection and in contact relation around a single inclined edge 25 actsto crease or sharpen the fold and improve the appearance of the product.

There is preferably secured upon the carrierplate 11, by screws 28, theslotted shank 29 of a guiding tube 30 which receives the piping strip 26in a flat condition and delivers it to the leadin tube 24 in alongitudinally folded condition, as will be readily understood.

The carrier-plate 11 with all the parts thereon may be instantly shiftedabout the screw 9 as a pivot between operative position (shown in fulllines in Fig. 4) and an out of the way position (shown in dotted linesin the same figure) without disturbing any of the adjustments hereinreferred to.

The base-plate 1 is formed adjacent the edgeguide 6 with a stop-shoulder31 which is engaged by the lip 12 to locate the carrier-plate 11 andparts carried thereby in correct operative position. In this position adownturned lip 32 on the plate 11 engages the thickened end-portion 10of the base-plate remote from the edgeguide 6.

, The invention is not to be understood as limited to the describeddetails of construction of the single embodiment of the inventionillustrated, as it is obviously susceptible of embodiment in variousspecifically different forms within the spirit of the invention.

Having thus set forth the nature of the invention, what I claim hereinis:-

1. The combination with an upper turn-down edge-folding guide and alower turn-up edgefolding guide, of means intermediate said edgefoldingguides for guiding a longitudinally folded piping strip, a supportingshank for each of said guides, said supporting shanks extendinglaterally away from theirrespective guides in the same direction, abase-plate, and means fastening said shanks in superposed relation tosaid base-plate.

2. In a sewing machine work-guiding attachment, the combination with abase-plate formed with an edge-guiding portion, of a carrier-platesuperposed upon and pivotally connected with said base-plate, aplurality of work-guides mounted, in advance of said edge-guidingportion, upon and individually adjustable relative to saidcarrier-plate, said work-guides having work-engaging portions disposedone above another, and means for adjustably mounting said base-plateupon the cloth-plate of a sewing machine.

3. The combination with a base-plate adapted to be adjustably mounted onthe cloth-plate of a sewing machine and having an edge-guiding wall, ofa carrier-plate pivotally mounted on said base-plate for movement toinoperative position, upper and lower edge-folding guides adjustablymounted on said carrier-plate in advance of said edge-guiding wall, anda piping guide disposed between said edge-folding guides and in advanceof said edge-guiding wall.

4. The combination with an upper turn-down edge-folding guide and alower turn-up edgefolding guide, of means at one side of said guides forlongitudinally folding a piping strip, and creasing means presenting anedge between and inclined to the direction of travel of the work throughsaid edge-folding guides over which both plies of the longitudinallyfolded piping strip are drawn in contact with one another to positionbetween the folded edge portions of material passing through saidedge-folding guides.

5. The combination with a lower turn-up edgefolding guide and an upperturn-down edgefolding guide for superposed plies of material, of meansat one side of said guides for longitudinally folding a piping strip andguiding it with its plies in contact relation in a direction transverseto the direction of travel of the material through said edge-foldingguides, and means intermediate said edge-folding guides for creasingsaid longitudinally folded piping strip and directing it to positionbetween the upper and lower plies of material.

6. The combination with a lower turn-up edgefolding guide and an upperturn-down edgefolding guide for superposed plies of material, of meansat one side of said guides for longitudinally folding a piping strip andguiding it with its plies in contact relation in a direction transverseto the direction of travel of the material. through said edge-foldingguides, and creasing means intermediate said edge-folding guides forinverting the contacting plies of said longitudinally folded pipingstrip and directing it to position between the upper and lower plies ofmaterial.

'7. The combination with superposed turndown and turn-up edge-foldingscrolls each having a work-supporting platform extending laterallytherefrom in one direction and a supporting shank extending laterallytherefrom in the opposite direction, of a carrier-plate upon whichshanks are mounted, and a base-plate upon which said carrier-plate ispivotally mounted, said base-plate having an edge-guiding wall risingtherefrom in rear of said shanks.

8. The combination with an upper turn-down edge-folding guide and alower turn-up edgefolding guide, of a piping guide disposed intermediatesaid edge folding guides and having a flat piping strip passagewaytherethrough and an inclined piping strip inverting edge at itsreceiving end disposed wholly at one side of the plane of said pipingstrip passageway, and means for longitudinally folding a piping stripand delivering it with its plies in contact relation to said invertingedge.

RUDOLPH J. SAILER.

